Improvement in combined punching and shearing machines



C. S WAN 80 N.

Combined Punching and Shearing-Machines.

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the form of an oblong metal plate.

UNITED STATES,

PATENT @FFIOE.

OHARLY SWANSON, OF NEWTON, IOWA.

IMPROVEMENT IN COMBINED PUNCHING AND SHEARING MACHINES.

Specification forming part of Letters Patent No. 145,694, dated December16, 1873; application filed November 4, 1873.

To all whom it may concern:

Be it known that I, GHARLY SwANsoN, of Newton, in the county of Jasperand State of Iowa, have invented a Combined Punch and Shears, of whichthe following is a specification:

My invention is a simple, strong, and durable machine, designed to beused alternately for cutting and punching metals. It consists inmounting a compound lever upon a frame, specially formed and adaptedtherefor, and combining therewith a punch and die and shear-blades, inthe manner and for the purposes hereinafter fully set forth.

My drawing is a perspective view, illustrating the construction andoperation of my invention.

A A represent the base of my machine, in

It is increased in thickness through its longitudinal center, where theframe is secured thereto, and also under the punch, where the die isinserted and secured thereto. 13 B are the uprights of the skeletonmetal frame, cast solid with the base A A, or rigidly secured thereto inany suitable manner. Q G are the horizontal bars or plates that formpart of the skeleton frame. They may be cast solid with the base anduprights, or attached thereto in any suitable way that will produce arigid, solid frame and support for the operative parts of the machine. DD is a lever, mounted upon the skeleton frame B O, and has its pivot andfulcrum in the right-hand upright B. A bolt or screw serves as a pivotand fulcrum. A cam or pin attached to the left portion of the lever Dtravels in a segmental slot formed in the left-hand upright B, and

I serves to retain and guide the movable lever in its operations ofpunching and shearing. E is a branch of the lever D, and depends fromthe point where the lever is pivoted. to is a flange of segmental form,on the bottom of the branch E. b is a bearing, of elbow form, attachedto the base A immediately under the pivoted point of the lever D. Itbears upon the flange a on the branch E, and aids in retaining andguiding and steadying the movements of the lever D, which carries thepunch and one of the shear-blades. F is a hand-lever, pivoted in a slotin the top of the left-hand upright B. It extends to the right, over andbeyond the machine. G is a common linlecounection, uniting the left endsof the levers D and F. c is the punch, pivoted to the right end andshort arm of the lever D in any suitable manner. (I is an adjustablestay-plate, held to the frame B O by setsorews. 'The punch passesthrough this plate, and is thereby guided to the die. f is a movabledie, in the form of a plate, dovetailed in a recess prepared for it inthe end of the base A.

Punches and dies of various forms'and sizes can be attached, in placesprepared for them, to press and perforate metal with any design or formdesired.

No. 1 is a shear-blade, fitted and rigidly attached with set-screws, orin any suitable way, to the left end of the upper frame-bar O. No. 2 isa corresponding blade, attached in a similar manner to the moving leverD. H H is an adjustable holder, of bench form, pivoted to earsprojecting from the base A, or in any other suitable manner. It servesto hold the metal in place, and horizontal, when placed in the shears tobe cut, as illustrated by the bar J. By this means one person canoperate the shears.

When a bar is properly placed in the shears, and under the holder H, itneeds no further attention, and the operator can press down the lever Fand cut the bar 01f at the point desired, and then replace it and cut itagain, if required.

The manner and convenience of machine, alternately as a punch andshears, are obvious, and the advantages of my long and compound loversto gain power are apparent.

I am aware that a punch and shears have been combined; but I claim thatmy manner of combination and form of machine is a new and valuableimprovement.

My machine may vary in size, to suit different work-shop uses.

I claim as my invention-- The base A A, frame B BO 0, the lever D havingpendent branch E with flange a, and carrying a punch and a shear-blade,the lever F, link-coupling G, stay-plate (I, die f, and holder H, whencombined to form a punch and shears, substantially as described.

Vitnesses: GHARLY SWANSON.

E. W. MITCHELL, W. M. MrrcrrELL.

using my

